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Numerical study of the effect of number factor and angle of vortex breaker blades on the performance of morning glory spillway
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Alireza Delzendeh Ghaneh   , Alireza Mardookhpour |
| Lahian Branch.Islamic Azad University , alireza.mardookhpour@liau.ac.ir |
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Abstract: (666 Views) |
Construction of morning glory spillway in earthen dams is preferred separately from the dam body, which reduces the risk of scouring and saturation of the downstream shell of the dam. Since at the input of this type of spillway, the flow is formed in a vortex. Vortex currents occur due to changes in flow direction, viscosity and surface tension. The presence of this type of flow has a negative impact on the performance of structures such as the spillway. A method that can be effective to control the vortex is to use vortex breaker blades, which will have a great effect on increasing the flow rate and flow rate. In this research, the modeling of the spillway along with the vortex breaker blades with the help of FLOW-3D software on the hydraulics of the spillway is investigated. The results showed that with increasing the number of blades on the overflow crown, the discharge coefficient has increased and this in turn increases the spillway efficiency. It was also observed that among the 5 angles tested, the vortex breaker with a 40 degree angle has better performance than other angles. Therefore, the sharper the vortex blades, the better the results.
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| Keywords: Numerical study, Vortex breaker blade, Morning glory Spillway, FlOW-3D software |
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Full-Text [PDF 1926 kb]
(88 Downloads)
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Type of Study: Research |
Subject:
سد و سازه
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